HWComposer.cpp revision c7d14e247117392fbd44aa454622778a25c076ae 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdint.h>
18#include <stdio.h>
19#include <stdlib.h>
20#include <string.h>
21#include <sys/types.h>
22
23#include <utils/Errors.h>
24#include <utils/String8.h>
25
26#include <hardware/hardware.h>
27
28#include <cutils/log.h>
29
30#include <EGL/egl.h>
31
32#include "HWComposer.h"
33#include "SurfaceFlinger.h"
34
35namespace android {
36// ---------------------------------------------------------------------------
37
38HWComposer::HWComposer(const sp<SurfaceFlinger>& flinger)
39    : mFlinger(flinger),
40      mModule(0), mHwc(0), mList(0), mCapacity(0),
41      mDpy(EGL_NO_DISPLAY), mSur(EGL_NO_SURFACE)
42{
43    int err = hw_get_module(HWC_HARDWARE_MODULE_ID, &mModule);
44    LOGW_IF(err, "%s module not found", HWC_HARDWARE_MODULE_ID);
45    if (err == 0) {
46        err = hwc_open(mModule, &mHwc);
47        LOGE_IF(err, "%s device failed to initialize (%s)",
48                HWC_HARDWARE_COMPOSER, strerror(-err));
49        if (err == 0) {
50            if (mHwc->registerProcs) {
51                mCBContext.hwc = this;
52                mCBContext.procs.invalidate = &hook_invalidate;
53                mHwc->registerProcs(mHwc, &mCBContext.procs);
54            }
55        }
56    }
57}
58
59HWComposer::~HWComposer() {
60    free(mList);
61    if (mHwc) {
62        hwc_close(mHwc);
63    }
64}
65
66status_t HWComposer::initCheck() const {
67    return mHwc ? NO_ERROR : NO_INIT;
68}
69
70void HWComposer::hook_invalidate(struct hwc_procs* procs) {
71    reinterpret_cast<cb_context *>(procs)->hwc->invalidate();
72}
73
74void HWComposer::invalidate() {
75    mFlinger->signalEvent();
76}
77
78void HWComposer::setFrameBuffer(EGLDisplay dpy, EGLSurface sur) {
79    mDpy = (hwc_display_t)dpy;
80    mSur = (hwc_surface_t)sur;
81}
82
83status_t HWComposer::createWorkList(size_t numLayers) {
84    if (mHwc) {
85        if (!mList || mCapacity < numLayers) {
86            free(mList);
87            size_t size = sizeof(hwc_layer_list) + numLayers*sizeof(hwc_layer_t);
88            mList = (hwc_layer_list_t*)malloc(size);
89            mCapacity = numLayers;
90        }
91        mList->flags = HWC_GEOMETRY_CHANGED;
92        mList->numHwLayers = numLayers;
93    }
94    return NO_ERROR;
95}
96
97status_t HWComposer::prepare() const {
98    int err = mHwc->prepare(mHwc, mList);
99    return (status_t)err;
100}
101
102status_t HWComposer::commit() const {
103    int err = mHwc->set(mHwc, mDpy, mSur, mList);
104    if (mList) {
105        mList->flags &= ~HWC_GEOMETRY_CHANGED;
106    }
107    return (status_t)err;
108}
109
110status_t HWComposer::release() const {
111    int err = mHwc->set(mHwc, NULL, NULL, NULL);
112    return (status_t)err;
113}
114
115size_t HWComposer::getNumLayers() const {
116    return mList ? mList->numHwLayers : 0;
117}
118
119hwc_layer_t* HWComposer::getLayers() const {
120    return mList ? mList->hwLayers : 0;
121}
122
123void HWComposer::dump(String8& result, char* buffer, size_t SIZE) const {
124    if (mHwc && mList) {
125        result.append("Hardware Composer state:\n");
126
127        snprintf(buffer, SIZE, "  numHwLayers=%u, flags=%08x\n",
128                mList->numHwLayers, mList->flags);
129        result.append(buffer);
130
131        for (size_t i=0 ; i<mList->numHwLayers ; i++) {
132            const hwc_layer_t& l(mList->hwLayers[i]);
133            snprintf(buffer, SIZE, "  %8s | %08x | %08x | %02x | %04x | [%5d,%5d,%5d,%5d] |  [%5d,%5d,%5d,%5d]\n",
134                    l.compositionType ? "OVERLAY" : "FB",
135                    l.hints, l.flags, l.transform, l.blending,
136                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
137                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom);
138            result.append(buffer);
139        }
140
141    }
142    if (mHwc && mHwc->common.version >= 1 && mHwc->dump) {
143        mHwc->dump(mHwc, buffer, SIZE);
144        result.append(buffer);
145    }
146}
147
148// ---------------------------------------------------------------------------
149}; // namespace android
150